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Carbonaceous double-layer paper-based friction material and preparation method thereof

A technology of paper-based friction material and carbonaceous material, applied in the preparation of carbonaceous double-layer paper-based friction material, in the field of carbonaceous double-layer paper-based friction material, can solve the problem of low friction coefficient, achieve simple molding process, friction The effect of increasing the coefficient

Inactive Publication Date: 2011-06-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the low friction coefficient of existing double-layer paper-based friction materials, the present invention provides a carbonaceous double-layer paper-based friction material, which fully utilizes the advantages of carbonaceous materials such as excellent friction and wear properties, thermal physical properties and chemical properties, Can improve the friction coefficient of double-layer paper-based friction material

Method used

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  • Carbonaceous double-layer paper-based friction material and preparation method thereof
  • Carbonaceous double-layer paper-based friction material and preparation method thereof
  • Carbonaceous double-layer paper-based friction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of paper-based friction material support layer preform: take 7g of paper fiber, 5g of aluminum silicate ceramic fiber, and 3g of mineral wool fiber; take 12g of kaolin, 9g of mineral powder, and 10g of calcium carbonate, and mix paper fiber, aluminum silicate Ceramic fiber, mineral wool fiber, kaolin, mineral powder and calcium carbonate are mixed and beaten to prepare a uniform slurry, and a paper-based friction material support layer prefabricated body is formed by a wet process.

[0022] Take 10g of carbon nanotubes, 4g of alumina and 1g of graphite, and mix them into a friction layer mixture. Among them, aluminum oxide and graphite are friction performance modifiers.

[0023] After drying the prefabricated body of the support layer, it is mechanically punched and uniformly coated with a layer of friction layer mixture on its surface; the impregnation concentration is 10wt% cashew nut shell oil modified phenolic resin solution, the content of c...

Embodiment 2

[0026] Embodiment 2: Preparation of paper-based friction material support layer prefabricated body: get hemp fiber 8g, polycrystalline mullite ceramic fiber 5g, glass fiber 7g; get kaolin 10g, barite 17g, calcium carbonate 8g, hemp fiber, polycrystalline The crystal mullite ceramic fiber, glass fiber, kaolin, barite and calcium carbonate are mixed and beaten to prepare a uniform slurry, and the paper-based friction material support layer prefabricated body is formed by a wet process.

[0027] Take 5g of pyrolytic carbon, 4g of alumina and 4g of graphite, and mix them into a friction layer mixture. Among them, aluminum oxide and graphite are friction performance modifiers.

[0028] Dry the prefabricated body of the support layer and punch it out mechanically, and evenly coat the surface with a layer of friction layer mixture; impregnate the cashew nut shell oil modified phenolic resin solution with a concentration of 5 wt%, and the content of the cashew nut shell oil modified p...

Embodiment 3

[0030] Example 3: Preparation of a paper-based friction material support layer preform: Take 11.5g of bamboo fiber and 10g of silicon carbide ceramic fiber; take 10g of the leftover material of the support layer in Example 1; take 6g of barite, 3.5g of mineral powder, and oxidize Zinc 9g, bamboo fiber, silicon carbide ceramic fiber, the leftover material of the support layer in Example 1, barite, mineral powder and zinc oxide are mixed and beaten to prepare a uniform slurry, and the paper-based friction material support is formed by a wet process layer prefab.

[0031] Take 15g of carbon nanotubes, 6g of aluminum oxide and 4g of graphite, and mix them into a friction layer mixture. Among them, aluminum oxide and graphite are friction performance modifiers.

[0032] Dry the prefabricated body of the support layer and punch it mechanically, and evenly coat the surface with a layer of friction layer mixture; impregnate the cashew nut shell oil modified phenolic resin solution wi...

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Abstract

The invention discloses a carbonaceous double-layer paper-based friction material and a preparation method thereof, aiming at solving the technical problem of low friction coefficient of the traditional double-layer paper-based friction material. According to the technical scheme, the carbonaceous double-layer paper-based friction material is prepared from 15-30% of reinforced fibre, 20-35% of filler, 5-15% of carbonaceous material, 5-10% of alumina and graphite and 25-35% of cashew nut shell oil modified phenolic resin. The preparation method comprises the following steps of: manufacturing and shaping a support layer in one time; and coating a friction layer on the surface of the support layer to obtain the carbonaceous double-layer paper-based friction material. Compared with the two-time manufacturing and shaping process in the background art, the preparation method is simpler. The coefficient of dynamic friction of the carbonaceous double-layer paper-based friction material is improved to 0.145-0.168 from 0.112-0.140 in the background art, and the coefficient of static friction is improved to 0.194-0.232 from 0.155-0.191 in the background art.

Description

technical field [0001] The invention relates to a paper-based friction material, in particular to a carbon double-layer paper-based friction material. It also relates to a preparation method of the carbonaceous double-layer paper-based friction material. Background technique [0002] Paper-based friction material is a wet friction material prepared by papermaking technology. Because of its many advantages, it is widely used in automatic transmissions and wet brakes of motor vehicles such as cars, buses and construction machinery. [0003] The development of motor vehicles in the direction of high speed and heavy load puts forward higher requirements for the friction performance, heat resistance and friction stability of friction materials. Studies have shown that the use of carbon fiber can improve the comprehensive performance of paper-based friction materials, but its production cost is high. . In view of the fact that when the friction material reaches its service life,...

Claims

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Application Information

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IPC IPC(8): C09K3/14C08J5/14
Inventor 付业伟范培育李贺军费杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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